This is an API for external (standalone) applications running on top of
U-Boot, and is meant to be more extensible and robust than the existing
jumptable mechanism. It is similar to UNIX syscall approach. See api/README
for more details.

Included is the demo application using this new framework (api_examples).

Please note this is still an experimental feature, and is turned off by
default.

Signed-off-by: Rafal Jaworowski <raj@semihalf.com>

Signed-off-by: Stefan Roese <sr@denx.de>

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>

interrupt_init() and dtimer_intr_setup() are placed in interrupts.c. Added interrupts.o to Makefile

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>

- update ARM boards to use constants from mach-types.h